3. Canxi oxit có thể tác dụng với chất nào sau đây ? a. H2O, CO2, HCI, H2SO4

b. CO2, H2O, NaOH, HCI, c. H2O, CO2, HCI, Na2SO4

d. H2O, CO2, HCl, NaCl

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.